多项选择题
Which two of these multicast deployments are most susceptible to attacks from unknown sources?（）
A.ASM B.BiDirPIM C.PIM-SMRP D.RP-Switchover E.SourceSpecificMulticast
单项选择题 What is the default value of the SPT threshold in Cisco routers?（）
单项选择题 To which of these does IP multicast send packets?（）
单项选择题 Which of these ports does syslog use to send messages to a syslog server?（）
